No suspicion was entertained of the cause of his death; the idea of such a crime could not even have entered into the imagination of any one. No external symptoms appeared, and the expedient of opening the body was never thought of. The friends of the family were desirous only of pitying and comforting them; and the inconsolable daughter, who had tended her father with such filial piety, had the largest share of sympathy. She returned as soon as possible to the arms of her paramour, and made up for the restraint imposed on her during her father's life by spending the money she had inherited by his death in undisguised profligacy. It afterwards appeared that this abandoned woman had made sure of the efficacy of her drugs by a variety of experiments, not only upon animals, but on human beings. She was in the habit of distributing to the poor poisoned biscuits, prepared by herself, the effect of which she found means to learn without committing herself. But this was not enough: she desired to be an eye-witness of the progress and symptoms of the effects produced by the poison; and for this purpose made the experiment on Françoise Roussel, her maid, to whom she gave, by way of treat, a plate of gooseberries and a slice of ham. The poor girl was very ill, but recovered; and this was a lesson to St. Croix to make his doses stronger. Madame de Sevigné, in one of her letters, written at a time when the public attention was engrossed by this strange affair, says, "La Brinvillier used to poison pigeon-pies, which caused the death of many people whom she had no intention of destroying. The Chevalier du Guet was at one of these pretty dinners, and died of it two or three years ago. When in prison, she asked if he was dead, and was told he was not. 'His life must be very tough, then,' said she. M. de la Rochefoucauld declares that this is perfectly true." M. d'Aubray's inheritance was not so beneficial to his infamous daughter as she had expected. The best part of his property went to his son, M. d'Aubray, who succeeded to his father's office, and another brother a counsellor. It was necessary, therefore, to put them out of the way also; and this task St. Croix, thinking his accomplice had done enough for his purposes, took upon himself.